Analysis of rainfall runoff characteristics from a subtropical urban lawn catchment in South-east China

被引：0
作者：
Jinliang Huang
Zhenshun Tu
Pengfei Du
Qingsheng Li
Jie Lin
机构：
[1] Xiamen University,Environmental Science Research Center
[2] Tsinghua University,Department of Environmental Science and Engineering
[3] Fujian Institute of Oceanography,undefined
来源：
Frontiers of Environmental Science & Engineering | 2012年 / 6卷
关键词：
rainfall runoff; first flush; pollution characteristics; urban lawn catchment;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Characteristics of rainfall runoff from a 3.26 hm2 urban catchment with predominant land-use as lawn in Xiamen City, South-east China were investigated and analyzed. Water quality and quantity measurements of rainfall runoff were conducted for ten rainfall events over the period March, 2008 to April, 2009. The results indicated that chemical oxygen demand (COD) and total phosphorus (TP) were the major pollutants with event mean concentrations of 56.09 and 0.44 mg·L−1. From hydrograph and pollutograph analysis of two typical rainfall events, it was clear that the peak rainfall preceded the peak flowrate by about 15–20 min. Meanwhile, concentrations of major pollutants showed multiple peaks and these peaks usually preceded peak flowrate. There were no distinctive first-flush effects except for the rainfall events with the longest rainfall duration and largest runoff volume, which was verified by the fact that the first 30% runoff volume (FF30) carried 39.36% of the total suspended solids (TSS) load, 35.17% of the COD load, 28.13% of the TP load and 39.03% of the nitrate nitrogen load. Multivariate regression analysis further demonstrated that the total runoff volume had a positive correlation with the FF30 of TSS and COD.
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页码：531 / 539
页数：8
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